 Despite there is no legal definition of the boundary of the water body, a related concept Port Shelter Water Control Zone had a legally defined boundary.It was regulated by the Water Pollution Control Ordinance (Chapter 358 of the Law of Hong Kong) as well as "Water Pollution Control (Port Shelter Water Control Zone) Order" (Chapter 358M) and other regulations.The water control zone covers not only the Port Shelter and Inner Port Shelter proper, but also Hebe Haven, Sham Tuk Mun (), Tsam Chuk Wan (), Rocky Harbour () and many other surrounding water body.